js实时显示系统时间

//获取div标签对象

var div=document.getElementById("mydiv")

var clock_id; function aa()  {   var date=new Date() var year=date.getYear(); var month=date.getMonth(); var day=date.getDate(); var hh=date.getHours(); var minute=date.getMinutes(); var second=date.getSeconds(); div.innerHTML="当前日期："+(year+1900)+"年"+(month+1)+"月"+day+"日"+hh+":"+minute+":"+second } window.onload=function(){ setInterval(aa,1000); }